/*
 *  Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include "histograms.h"

namespace webrtc {

    Histograms::Histograms() {
        Clear();
    }

    void Histograms::Clear() {
        lrt_.fill(0);
        spectral_flatness_.fill(0);
        spectral_diff_.fill(0);
    }

    void Histograms::Update(const SignalModel &features_) {
        // Update the histogram for the LRT.
        constexpr float kOneByBinSizeLrt = 1.f / kBinSizeLrt;
        if (features_.lrt < kHistogramSize * kBinSizeLrt && features_.lrt >= 0.f) {
            ++lrt_[kOneByBinSizeLrt * features_.lrt];
        }

        // Update histogram for the spectral flatness.
        constexpr float kOneByBinSizeSpecFlat = 1.f / kBinSizeSpecFlat;
        if (features_.spectral_flatness < kHistogramSize * kBinSizeSpecFlat &&
            features_.spectral_flatness >= 0.f) {
            ++spectral_flatness_[features_.spectral_flatness * kOneByBinSizeSpecFlat];
        }

        // Update histogram for the spectral difference.
        constexpr float kOneByBinSizeSpecDiff = 1.f / kBinSizeSpecDiff;
        if (features_.spectral_diff < kHistogramSize * kBinSizeSpecDiff &&
            features_.spectral_diff >= 0.f) {
            ++spectral_diff_[features_.spectral_diff * kOneByBinSizeSpecDiff];
        }
    }

}  // namespace webrtc
